DFSMShsm monitors how full a list structure has become. When the structure becomes 95% full, DFSMShsm no longer places recall requests onto the CRQ, but routes all new requests to the local queues. Routing recall requests to the CRQ resumes once the structure drops below 85% full. The structure is not allowed to become 100% full so that requests that are in-process can be moved between lists within the structure without failure. When the structure reaches maximum capacity, the storage administrator can increase the size by altering the structure to a larger size or by rebuilding it. A rebuild must be done if the maximum size has already been reached. (The maximum size limit specified in the CFRM policy must be increased before the structure is rebuilt). You can use the CF services structure full monitoring feature to monitor the structure utilization of the common recall queue.